power_supply: bump EC version check that we refuse to run with in olpc_battery
Refuse to run with an EC < 0x44. We're playing it safe, and this is a pretty
old EC version.
Also, add a comment about why we're checking the EC version.
Signed-off-by: Andres Salomon <dilinger@debian.org>
Cc: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>
diff --git a/drivers/power/olpc_battery.c b/drivers/power/olpc_battery.c
index d5fe6f0..c8b596a 100644
--- a/drivers/power/olpc_battery.c
+++ b/drivers/power/olpc_battery.c
@@ -389,8 +389,14 @@
if (!olpc_platform_info.ecver)
return -ENXIO;
- if (olpc_platform_info.ecver < 0x43) {
- printk(KERN_NOTICE "OLPC EC version 0x%02x too old for battery driver.\n", olpc_platform_info.ecver);
+
+ /*
+ * We've seen a number of EC protocol changes; this driver requires
+ * the latest EC protocol, supported by 0x44 and above.
+ */
+ if (olpc_platform_info.ecver < 0x44) {
+ printk(KERN_NOTICE "OLPC EC version 0x%02x too old for "
+ "battery driver.\n", olpc_platform_info.ecver);
return -ENXIO;
}